Question

Question. Equal weight of me equal weight of Ethane and hydrogen are mixed in an Empty container of 25 degree Celsius the fraction of the total pressure exerted by hydrogen is???

Answer 1

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Let the x gram gas is mixed

Mole of ethane =
$\frac{x}{30}$
Mole of hydrogen = x/2

mole fraction of hydrogen =
$\frac{ \frac{x}{2} }{ \frac{x}{2} + \frac{x}{30} } \\ = \frac{15}{16}$

= mole fraction of hydrogen

= 15 : 16

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Answer 2

Let x g each of hydrogen and ethane are mixed.

The moles of hydrogen and methane are

x\2

and

x\30

respectively.

The mole fraction of hydrogen is

=x2\x\2+x\30=15\16

The partial pressure of hydrogen is the product of its mole fraction and total pressure.

Thus,

Partial pressure of H2 Total pressure=mole fraction of hydrogen=15\16